Mental and physical harrassment by Daughter in law and son

My son and daughter in law has been harrassing me since their marriage, the fights and torture revolved around property issue only. Thus, Me and my late husband decided to transfer one of our property to them , to get rid of the daily harrasment. Later , when my husband died in 2013 , the son and daughter in law came back to my house saying , I am old and they would take care of me, but later they started harrassing me again, Both mentally and physically. They threatened me to not to talk to any of our Neighbours, relatives and even my 4 daughters. My son and daughter in law even told me that they will sieze all my property as soon as possible and I will die soon. I have even filled a complaint to police once , when the police came , my son told them that my mental state is not right and even police did not helped me. Next day, I called my daughters and told them to take me with them or I will be dead. I dont want to live with him. Please guide me a legal procedure.